Refer to
keke.
This did NOT originate
in WoW, it is simply a shorter keke, similar to heh vs hehe.
It DOES translate from
orcish to common as lol in WoW, this just doesn't happen to be the origin of the laugh. Whether or not this translation is intentional is beyond me.
Orc says kek
Ally sees lol
WoW players who are complete
newbs to gaming think this is how kek started being used as a term to show laughing.